waist tuck 

the act of pulling an erection under the waistline so as to avoid detection

When I had to get up answer the question on the chalkboard I did a waist tuck so that Mrs. Michael wouldn't see that I was sportin' a fatty.

waist tuck by XyourXworstXnightmareX January 23, 2005

Waist Trap Tucker 

One who conceals his boner by doubling up his underwear waistband or sometimes even wearing two pairs in order to trap the tumescent trunk. Thus allowing said deviant the ability to roam the streets without arousing suspicion or exposing his desire to tame the beast.

Photographer: 'OK I think we got the shot, girls. Let's break for 10 minutes while I reload. Hot! Hot! Hot!'

Ballerina 1: "Francesca, I swear that pervert has a sock in his pants or something. Ewww. He kept hiding it behind his tripod"

Ballerina 2: "For sure. Like, he must be a 'Waist Trap Tucker' or something. Gross."

Waist Trap Tucker by White Walker January 18, 2013